MEASUREMENT OF A THERMAL EXCHANGE COEFFICIENT IN POROUS MEDIA BY INFRARED THERMOGRAPHY - TWO-TEMPERATURE MODEL APPLICATION

1998 ◽  
Author(s):  
Laurianne Ramond ◽  
Jean-Christophe Batsale ◽  
Claire Gobbe ◽  
Michel Quintard
Keyword(s):  
Porous Media ◽  
Infrared Thermography ◽  
Temperature Model ◽  
Exchange Coefficient ◽  
Model Application ◽  
Thermal Exchange ◽  
Two Temperature

Investigation of transportation of nanofluid within non-equilibrium porous media

2021 ◽  
pp. 2250010
Author(s):  
Yahya Ali Rothan
Keyword(s):  
Numerical Modeling ◽  
Porous Media ◽  
Homogeneous Model ◽  
Working Fluid ◽  
Thermal Plume ◽  
Temperature Model ◽  
Thermal Plumes ◽  
Solid Region ◽  
Porous Zone ◽  
Two Temperature

In this investigation, numerical modeling for the behavior of nanomaterial inside a porous zone with imposing Lorentz force has been illustrated. The working fluid is a mixture of H2O and CuO and due to concentration of 0.04, it is reasonable to use the homogeneous model. Two-temperature model for porous zone was employed in which new scalar for calculating temperature of solid region was defined. CVFEM has been applied to model this complex physics. Radiation terms were considered and their influence on Nu has also been considered. Verification with benchmark proves greater accuracy. Dispersing nanopowders helps the fluid to increase velocity and reduce the temperature of inner wall. Rise of Ra results in three strong eddies inside the zone which creates two thermal plumes and it reduces the temperature of square surface about 68%. With rise of Nhs, the power of counter-clockwise vortex reduces about 61.6% and inner wall becomes warmer about 33.3%. Raising the Ha makes thermal plume to vanish and cooling rate decreases about 46.6%. Augment of Nhs makes Nu to reduce about 5.08% while augment of Ra makes it to augment about 35.64%. Also, augmenting Ha makes Nu to decline about 56.45%.

GENERAILIZED TWO-TEMPERATURE MODEL FOR COUPLED PHONONS IN NANOSIZED GRAPHENE

2018 ◽  
Author(s):  
Meng An ◽  
Qichen Song ◽  
Xiaoxiang Yu ◽  
Han Meng ◽  
Dengke Ma ◽  
...  
Keyword(s):  
Temperature Model ◽  
Two Temperature

scholarly journals A Two-Temperature Model for LBVs

2004 ◽  
Vol 2004 (IAUS226) ◽  
pp. 506-510
Author(s):  
J. H. Guo ◽  
Y. Li ◽  
H. G. Shan
Keyword(s):  
Temperature Model ◽  
Two Temperature

A two‐temperature model of the inductively coupled rf plasma

1987 ◽  
Vol 61 (5) ◽  
pp. 1753-1760 ◽  
Author(s):  
Javad Mostaghimi ◽  
Pierre Proulx ◽  
Maher I. Boulos
Keyword(s):  
Rf Plasma ◽  
Temperature Model ◽  
Inductively Coupled ◽  
Two Temperature

Evaluation of temperature effect on growth rate of Lactobacillus rhamnosus GG in milk using secondary models

2013 ◽  
Vol 67 (7) ◽  
Author(s):  
Ľubomír Valík ◽  
Alžbeta Medveďová ◽  
Michal Čižniar ◽  
Denisa Liptáková
Keyword(s):  
Growth Rate ◽  
Growth Parameters ◽  
Lactobacillus Rhamnosus ◽  
Probiotic Bacterium ◽  
Extended Model ◽  
Temperature Model ◽  
Lactobacillus Rhamnosus Gg ◽  
Model Application ◽  
Cardinal Temperature ◽  
Cardinal Temperatures

AbstractThe application of secondary temperature models on growth rates of Lactobacillus rhamnosus GG, the much studied probiotic bacterium, is investigated. Growth parameters resulting from a primary fitting were modelled against temperature using the following models: Hinshelwood model (H), Ratkowsky extended model (RTK2), Zwietering model (ZWT), and cardinal temperature model with inflection (CTMI). As experienced by other authors, the RTK2, ZWT, and CTMI models provided the best statistical indices related to fitting the experimental data. Moreover, with the biological background, the following cardinal temperatures of L. rhamnosus GG resulted from the study by the model application: t min = 2.7°C, t opt = 44.4°C, t max = 52.0°C. The growth rate of the strain under study at optimal temperature was 0.88 log10(CFU mL−1 h−1).

Sign in / Sign up

Export Citation Format

Share Document